diff --git a/composer.json b/composer.json
index d58a88aa..7dd1bef4 100644
--- a/composer.json
+++ b/composer.json
@@ -84,6 +84,9 @@
     },
     "config": {
         "process-timeout": 0,
-        "sort-packages": true
+        "sort-packages": true,
+        "platform": {
+            "php": "7.0"
+        }
     }
 }